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China rolling mill oil film bearing skills (2)
Source: China Bearing Network Time: 2013-03-27
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2. Production skills; the development of the primary parts of China's rolling mill oil film bearings; started in the late 1950s; in the absence of a pattern, two no data, three no proprietary equipment.
It is not easy to develop the primary parts of rolling mill oil film bearings; it has a complete set of operating procedures from data selection, process roads, processing methods to special tooling drawing and production. From the selection of materials; to consider the matching of taper sleeves and anti-friction materials. The casting process of the taper sleeve; the connection between the bushing steel sleeve and the antifriction material; the technological progress of the steel sleeve, from the craft road; the satisfaction of the skill requirements of the cone and the bushing; together with the existing processing equipment; The theory of self-demand is in good contact with the theory; for example, how to carry out physical (including machining) and chemical treatment in the inner and outer parts of the steel sleeve; to add contact force, in the processing method; we know; the cone sleeve and the bushing are civilian products The processing precision is the highest; the roughness of the taper sleeve is Ra0. 05μm (the bushing is Ra0. 2μm); the precision is high; the deformation is difficult to control; the surface roughness is low; the super finishing is necessary; the outer prism is not allowed to be presented. , spiral, vibrating, etc., the depiction and production of special tooling; is also very important; is to complete the processing method; to ensure the accuracy of processing accuracy.
In the early 1960s, the production of the primary part of the oil film bearing on the ordinary machine tool was completed.
In the late 1960s; Taiyuan Heavy Machinery Plant built a special production workshop for rolling mill oil film bearings; it started a new era of China's complete production of rolling mill oil film bearings.
3. Test skills; consists of two parts: one is the measurement skill of the part processing; the other part is the measurement skill in the experimental discussion.
Because the processing precision of the primary part of the oil film bearing is high; the demand measurement is accurate and convenient. In order to reach this demand, it is necessary to have a high-precision measuring instrument (with) and a supporting instrument (with); together; The measurement and quality measurement after processing is completed; it is necessary to perform scientific measurement methods and skilled skills. To this end; in addition to purchasing and customizing high-precision measuring instruments (with); also depicting and producing special instruments (with) And attachments; fulfill a set of scientific measurement methods and procedures. This ensures that the measurement repeatability is good; high precision.
In order to deepen the knowledge of the parameters of the oil film bearing operation; discuss the regularity; Taiyuan Heavy Machinery Factory has done a lot of laboratory bench measurement and bearing load, transformation, power consumption and oil supply in the actual operation since 1972. Such as the measurement of external internal parameters. Test scale; oil film pressure field, oil film thickness field and oil film temperature field including the inner working area of ​​the bearing; the measurement of these fields is attributed to unconventional; from measuring sensor to secondary appearance; There is no ready-made to buy; therefore; to develop by itself. The strength laboratory of Taiyuan Heavy Machinery Plant is the main body; a professional test force is built; joint research with Tsinghua University and other units; research and development of test skills and instrument appearance ; Conducted resistance, inductive, capacitive and eddy current testing skills and research and development of primary and secondary instruments; and successfully obtained a lot of data; good repeatability; strong regularity; high precision measurement. Also related skills; including calibration, anti-interference, reverse signal delivery; and simultaneous measurement, recording, printing, etc. of various signals Conducted research and use.
4 theoretical discussion; after the successful development of the primary parts of the rolling mill oil film bearing; the former Ministry of Machinery issued the product development and theoretical research mission to the Taiyuan Heavy Machinery Plant; the theoretical research work in the early 1960s; the first is the product's depiction accounting; It is based on experience.
Following the continuous improvement of the installed capacity of the rolling mill; the theoretical research work of the oil film bearing of the rolling mill was driven; the theoretical research work of the real self-expanded; started in 1974.
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